even if they do release a new firmware before 4.0 to patch the exploit, all of the jailbreaking community pretty much knows that the only reason to release something new will be to patch it and won't update untill another exploit comes out to re-jailbreak......no one really knows if they are going to come out with one though. It's all just speculation.

IF Apple releases something to patch the Spirit exploit, then don't update. Simple.

Will they? I doubt it. As others have said, Apple is probably extraordinarily busy with 4.0 at the moment, and should be focusing their efforts on bringing it up to use for the general public. I don't think they would waste precious time/money/human resources on patching an exploit that only affects a small minority (that's the jailbreakers), especially when they are well on their way to releasing 4.0. Instead, they will probably just incorporate a patch into 4.0.